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#include <iostream>
#include <Windows.h>
#include <cstdlib>
#include <cmath>
#include <string>
using namespace std;
double add(double &d, double &e);
double subtr(double &d, double &e);
double multip(double &d, double &e);
double divi(double &d, double &e);
double radical(double &d);
double square(double &d);
int main()
{
HANDLE hConsole;
hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN| FOREGROUND_INTENSITY);
double d(0), e(0), f(0);
double g(0), h(0), i(0);
string first;
string ans;
cout << "Enter the number you want to use: ";
cin >> d;
cout << "need another number? (y/n): ";
cin >> ans;
if (ans == "y")
{
cout << "Enter your second number: ";
cin >> e;
cout << "Enter the operation you wanna perform: ";
getline(cin, first);
}
else
{
cout << "Enter the operation you wanna perform: ";
getline(cin, first);
}
//input handling-------------------------------------------------------------------------------------------------------------------------------------------
if (first == "add" || first=="addition"||first=="Add"||first=="Addition"||first=="ADD"||first=="ADDITION")
{
system("cls");
cout<<add(d,e);
}
else if (first == "subtract" || first == "subtraction" || first == "Subtract" || first =="Subtraction" || first =="SUBTRACT"||first=="SUBTRACTION")
{
system("cls");
cout<<subtr(d,e);
}
else if (first == "multiply" || first == "multiplication" || first == "Multiply" || first =="Multiplication" || first =="MULTIPLY"||first=="MULTIPLICATION" )
{
system("cls");
cout << multip(d,e);
}
else if (first == "divide" || first == "division" || first == "Divide" || first == "Division" || first == "DIVIDE" || first == "DIVISION")
{
system("cls");
cout << divi(d,e);
}
else if (first == "Square Root" || first == "Square root" || first == "square root" || first == "SQUARE ROOT" || first == "sqrt" || first == "Sqrt" || first == "SQRT" || first == "RADICAL" || first == "radical" || first == "Radical" || first == "Root" || first == "root" || first == "ROOT")
{
system("cls");
cout << radical(d);
}
else if (first == "square" || first == "Square" || first == "SQUARE")
{
system("cls");
cout << square(d);
}
cout << endl;
system("pause");
}
//functions----------------------------------------------------------------------------------------------------------------------------------------------
double add(double &d,double &e)
{
return d + e;
}
double subtr(double &d, double &e)
{
return d - e;
}
double multip(double &d, double &e)
{
return d*e;
}
double divi(double &d, double &e)
{
return d / e;
}
double radical(double &d)
{
return sqrt(d);
}
double square(double &d)
{
return d*d;
}
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